Attachment for squares for builders  and joiners  use



(No Model.)

A. G. OLSON & J. MQPARLANE.

ATTACHMENT FOR SQUARES FOR BUILDERS AND JOINERS USE.

No. 302,767. Patented July 29, 1884.

q d1 f K; H m I 9 v m x R N I 1 W? I I WITNESSES: I gIggiNTUR: y

ATTORNEYS.

, UnrTEn STaTEs PATENT EETEE.

ANDRINV G. OLSON AND JOHN MGFARLANE, OF DULUTH, MINNESOTA.

ATTACHMENT FOR SQUARES FOR BUILDERSAND JOINERSUSE.

SPECIFICATION forming part of Letters Patent No. 302,767, dated July 29, 1884-.

Application filed April 23, 1884. (No model.)

To (all whom it may concern.-

Be it known that we, ANDREW G. OLSON and JOHN MOFARLANE, both of Duluth, in the county of St. Louis and State of Minnesota, have invented a new and Improved Attachment for Squares for Builders and Joiners Use, of which the following is a full, clear, and exact description.

This invention consists in an adjustable scale or divided measuring attachment for squares for builders or carpenters and j oiners use, whereby increased facilities are afforded for measuring or laying out rafters; also for beveling the toes and heels thereof, likewise for-laying out stairs and other purposes or uses, substantially as hereinafter described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a face View of a square with our improved attachment applied. Fig. 2 is a side view of the attachment in part, and Fig. 3 a transverse section of said attachment. 7

The tongue A and blade B of the square have the usual measurements or divisions on them.

0 is the attachment,which consists of a flat bar or rule having inch-measurements on its face I), with the necessary subdivisions, and a scale of half-inch to .the inch on its side, which is constructed to form a fence, 0. At the one end of this bar, on the face 1) thereof, is a fixed elongated open-ended jaw, 61, provided with a set-screw, e, and adjustable on and along or over the face of said bar by means of a longitudinal slot, f, in the bar, and a sliding stud or rivet, g, is another elongated open-ended jaw, h,having aset-screw, i.

To use the attachment for making a rafterpattern, take as many inches on the tongue A of the square as will correspond by scale to the elevation of the roof of the building, and even or set the corner or of the attachment to such measurement on the outer longitudinal margin of the tongue, as shown in Fig. 1, the tongue of the square lying in belength of the rafter on the face I) of the attachment at the point where it and the square intersect. The bevels for the toe and heel cuts will be given by placing the square on the rafter with the attachment by the fence 0 against its face side.

For laying out a brace-pattern, the attachment and square are used in the same way; but for short braces and rafters the scale on the attachment should be one foot for every two inches, to provide for which the scale of two inches to the foot is arranged on the one side.

The device may also be used for laying out the elevation of stairs by taking one inch on the tongue of the square for every inch in height of the rise, then taking as many inches on the blade as there are in the width of the step, and a perfect templet is obtained, far superior to a board, and the trouble of making such avoided.

The attachment can be used on all kinds of bevel-work, and in its combination with an ordinary square will be found far superior to abevel-squa-re.

The ordinary length of the attachment will be twenty-four inches. It may be made of steel, iron, brass, or other suitable material, and of any required thickness.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. The within-described attachment for a right-angled square, having graduations on its tongue and blade, the same consisting of a measuringbar or rule, 0, formed with a fence, 0, along one edge, provided with a fixed openended jaw, d, at its one end, and an adjustable or sliding open-ended jaw, h, and means applied to said jaws for seeming the attachment when set on the square, substantially as and forthe purposes specified.

2. Thelongitudinally-slottedmeasuring-bar 'whole being adapted for usein conneetionwith C constructed with it fence, 0, along its one acarpentersandbuildersor other likesquare, IO edge or side, and having different scales on' essentially as described. its'slotted face and fence side, in eombina- ANDREW G. OLSON. tion with the fixed open-ended jaw d, at the JOHN MOFARLANE.

one end of its face, provided with a set-screw, Vitnesses: e, and the longitudinally-adjustable or sliding" ERICK N. OLSON, openended jaw h, having it set-screw, vi, the DANL. G. OAsiL- 

